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zbr — 0.93F,-- ,F <br />tc = <br />s <br />Sbr + (0.9 * sTBf) <br />nbr nref <br />tc - 2193.0 - (0.9 * 1286.5) =16.41 <br />1119654.6 (0.81 * 162650.9) <br />30 + 30 <br />_ SE ar <br />dfsar SEbr + (0.9 * SErgf�; <br />Vnb, 1 nr1sf- 1 <br />1119654.6 (0.81 * 162650.9); - <br />—+ 30 <br />df &Qr _ - 35.7 or 36 <br />1k93.2 4 + (0.9 s 76.2)" <br />30 - Y 30- 1 <br />Since critical t, = 0.852 (one - tailed, alpha = 0.2, 36 dfsat) and t, (16.41) is greater than this critical value, <br />the hypothesis of no difference is rejected. Consequently revegetation success for Phase III in BRB -5 <br />relative to the Sagebrush Reference Area is demonstrated. <br />Since the herbaceous production of BRB -5 has been shown to exceed both reference areas via the <br />above hypothesis tests, revegetation success is indicated for herbaceous production in 2011. <br />WOODY PLANT DENSITY <br />Figure C -3 and C-4 graphically presents the "Background" and "Concentration Area" woody plant density <br />averages for the 2011 BRB -5, respectively. As can be seen, the 554.4 stems per acre observed in the <br />Background area far exceed the 90 stems per acre (90 percent of the 100 stems per acre background <br />standard) performance standard. The mean of 2,035.6 stems per acre observed in the Concentration <br />areas also well exceeds the 900 stems per acre (90 percent of the 1,000 stems per acre background <br />standard) performance standard. The total Concentration Area identified was 19.0 acres, or 7.1% of the <br />BRB -5 (269.3 acres). Hence the standard that there would be at least 5% of the Phase III BRB block with <br />at least 1,000 stems per acre has been met for 2011. <br />A reverse t-test of the assertion that the 2011 BRB -5 Background woody plant density is indistinguishable <br />from 90% of the standard is as follows: <br />22 <br />